Why would it be wrong to suggest that machines us by increasing the amount of work done

Why doesn't heat added to water make the tempature rise above 100c

Which element is the least metallic between cadmium, silver, zinc, or iron?

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.